THE SCRIPTURAL COMMENTARIES OF YOGIRAJ SRI SRI SHYAMA CHARAN LAHIRI MAHASAYA: VOLUME 1

"""This book is a [key to the] door of heaven, a secret treasure-trove of nectarous immortality and the sacred garland around the throats of Kriyavans. One who has once drunk the nectar falling from the Sahasrar - he should sit in complete secrecy and study this book. 'Study' means abiding with complete stillness of mind - meaning, the par avastha of Kriya, which is extremely secret. Because all of these secret matters are in this work, this [work] is hereby given the name 'Manu Rahasya.'""
--from the Introduction of the original Bengali Edition of Lahiri Mahasaya's Manu Samhita"